公开(公告)号：US10243516B2

公开(公告)日：2019-03-26

申请号：US15888031

申请日：2018-02-04

申请人： ONKYO CORPORATION

发明人： Tsuyoshi Kawaguchi ,  Norimasa Kitagawa ,  Takuya Oka

IPC分类号： H03F1/02 ,  H03F1/30 ,  H03F1/34 ,  H03F3/181 ,  H03F3/26 ,  H03F3/50 ,  H03F3/183 ,  H03F3/21

摘要： A first circuit unit of an audio amplifier includes a first emitter follower connected to an pre stage input terminal, a second emitter follower connected to an pre stage input terminal, a main transistor connected to an output path of the first emitter follower and an output path of the second emitter follower, a first resistor and a second resistor, which are series-connected between the output path of the first emitter follower and a DC voltage source, and a zener diode connected to a series-connection point between the first resistor and the second resistor. A second circuit unit has a circuit configuration that is complementary to the first circuit unit. A path leading to a collector of each transistor configuring the first and second emitter followers in one of the circuit units is connected to the series-connection point in the other circuit unit.

公开(公告)号：US10149053B2

公开(公告)日：2018-12-04

申请号：US15657142

申请日：2017-07-22

申请人： Onkyo Corporation

发明人： Hiroki Kurosaki ,  Tsuyoshi Kawaguchi ,  Yoshinori Nakanishi ,  Hiroyuki Asahara ,  Norimasa Kitagawa

IPC分类号： H04R3/04 ,  H03G3/30 ,  H03G5/16 ,  H04S1/00 ,  H03G9/02 ,  H04R3/00

摘要： To resolve volume shortage of middle and high band of speaker reproduction sound. A DSP 4 performs LPF processing to extract low frequency component of an audio signal to which the first volume processing is performed, DRC processing to compress the audio signal to which the LPF processing is performed in case that the audio signal to which the LPF processing is performed is not less than a predetermined signal level, HPF processing to extract high frequency component of the audio signal to which the first volume processing is performed, second volume processing to attenuate the audio signal to which the HPF processing is performed based on the volume value that is received, and synthesis processing to synthesize the audio signal to which the DRC processing is performed and the audio signal to which the second volume processing is performed.

公开(公告)号：US09712919B2

公开(公告)日：2017-07-18

申请号：US15238634

申请日：2016-08-16

申请人： Onkyo Corporation

发明人： Kei Asao ,  Tsuyoshi Kawaguchi ,  Makoto Yoshida ,  Takanori Shiozaki ,  Yoshinori Nakanishi ,  Hiroyuki Asahara ,  Norimasa Kitagawa

IPC分类号： H04R5/033 ,  H04R5/04 ,  H03F3/187 ,  H03F3/45 ,  H03F3/72 ,  H03M1/66

CPC分类号： H04R5/033 ,  H03F3/187 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/03 ,  H03F2203/7227 ,  H03M1/66 ,  H04R5/04

摘要： To reduce signal output and wiring to a D/A converter (DAC).A DAP 1 comprises a DAC 7 that D/A-converts LR 2 channels digital audio data into LR 2 channels analog audio data, an amplification circuit 9 that amplifies the LR 2 channels analog audio data that the DAC 7 D/A-converts, a DAC 8 that D/A-converts the LR 2 channels digital audio data into the LR 2 channels analog audio data, and an amplification circuit 10 that amplifies inverted LR 2 channels analog audio data that the LR 2 channels analog audio data that the DAC 8 D/A-converts is inverted.

公开(公告)号：US11277684B2

公开(公告)日：2022-03-15

申请号：US16733020

申请日：2020-01-02

申请人： Onkyo Corporation

发明人： Norimasa Kitagawa ,  Mitsuhiko Tokuda ,  Yoshinori Nakanishi ,  Ryuta Shigematsu ,  Koichi Sadaie ,  Yoshitada Takeshima

IPC分类号： H04R1/28 ,  H04R1/34 ,  G10K11/20 ,  H04R7/12 ,  H04R9/04 ,  H04R9/06

摘要： A diffuser which forms a first acoustic passage that sound waves propagate and which radiates the sound waves to an outer diameter direction between a diaphragm and an annular conical surface of a first reflection member, and forms a second acoustic passage the sound waves which pass the opening of the first reflection member propagate and which radiates the sound waves to an outer diameter direction between the annular concave surface of the first reflection member and a conical surface of a second reflection member.

公开(公告)号：US09762197B2

公开(公告)日：2017-09-12

申请号：US15238644

申请日：2016-08-16

申请人： Onkyo Corporation

发明人： Kei Asao ,  Tsuyoshi Kawaguchi ,  Makoto Yoshida ,  Takanori Shiozaki ,  Yoshinori Nakanishi ,  Hiroyuki Asahara ,  Norimasa Kitagawa

IPC分类号： H04R5/04 ,  H03G3/34 ,  H03F3/183 ,  H03M1/66 ,  H03F1/26 ,  H03F3/187 ,  H03F3/45 ,  H03F3/72

CPC分类号： H03G3/341 ,  H03F1/26 ,  H03F3/183 ,  H03F3/187 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/03 ,  H03G3/348 ,  H03M1/66 ,  H04R5/04

摘要： To realize active control ground that sets inverted output of an amplification circuit to ground with simple configuration.A DAP 1 comprises a positive side DAC 7 that D/A-converts digital audio data into analog audio data, a positive side amplification circuit 9 that amplifies the analog audio data that the DAC 7 D/A-converts, a negative side DAC 8 that D/A-converts the digital audio data into the analog audio data, and a negative side amplification circuit 10 that amplifies the analog audio data that the DAC 8 D/A-converts, and a CPU 2. The CPU 2 mutes the DAC 8 in case of an ACG mode that sets output of the amplification circuit 10 to ground.